Sianipar, Christin Natalia. “Analysis of Non-Agricultural Economic Growth Rates in Tanah Jawa District, Simalungun Regency”. Jurnal Mantik 6, no. 2 (June 24, 2022): 1326-1332. Accessed October 17, 2026. https://www.iocscience.org/ejournal/index.php/mantik/article/view/2487.